Thanks for replying ,but I did forget to mention this was a clean install build on 1 of the PCs and used Acronis deployment of the image to all the other PCs. The image PC worked fine for a few days here in the office during testing all the software , so that was when I decided to deploy to our computer lab. The next day after deployment was when I noticed I could not VNC into some of the machines(offsite lab) and went back to the sites and discovered the forementioned issue. We also use Deep Freeze on our workstations, but we have Windows 7 and Deep freeze in other labs but different model Dells, Thanks